Kuroshitsuji is the Japanese title of Black Butler, the manga by Yana Toboso that began in 2006 and was adapted into an anime series in 2008 following butler Sebastian Michaelis and earl Ciel Phantomhive. Like many anime, the show uses an eyecatch at the commercial break, and this short cue became the recognisable intermission moment fans rip and reuse. Online it circulates among other anime transition sounds like To be Continued, used to mark a pause before the story resumes with a new tone.